Crank disk and pin for steam-engines.



N0 MOD N o. 767,877. PATENTED AUG. 16, 1904.

' Wk Rn EMING. I CRANK DISK AND PIN FOR STEAM ENGINES.

I I ABPLIGAT'IOH FILED SEPTQIB, 1903.

UNITED STATES PatentedAugust 16, 1904.

PATENT OFFICE.

WILLIAM R. FLEMING, OF HARRISBURG, PENNSYLVANIA.

SPECIFICATION forming part of Letters Patent No. 767,877, ated August16, 1904.

Application filed September 19, 1903. Serial No. 173,82. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM R. FLEMING. of Harrisburg, in the county ofDauphin and State of Pennsylvania, have invented certain new and usefulImprovements in Crank Disks and Pins for Steam-Engines; and I do herebydeclarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to certain new and useful improvements in crankdisks and pins for steam-engines, the same being particularly designedfor use in connection with the sidecrank style of engine.

The invention has for its object the production of a crank disk and pinmade of one integral piece of metal. A further object is to so constructthe parts as to secure a maximum strength attheir point of union. Afurther object is to provide simple and efficient means whereby thecrank and its disk may receive effective lubrication.

The invention will be hereinafter fully set forth, and particularlypointed out in the claims.

In the accompanying drawings, Figure 1 is a front face View illustratingmy improved crank disk and pin. Fig. 2 is a rear view. Fig. 3 is an edgeView. Fig. 4 is a section on line 4 4, Fig. 1.

Referring to the drawings, 10 designates the disk, having a centralopening 11 to receive the engine-shaft 12, which is keyed thereto in anypreferred manner, strengthening webs or collars 13 14 being formed oneach face of the disk adjacent said opening 11. The crank-pin 15 is madeintegral with the disk 10 and provided with the usual flange 16, asshown. Leading in from the rear face of disk 10 and centrally locatedwith relation to the pin 15 is a bore 17, preferably formed by using acore in casting. Said bore or chamber extends longitudinally through aportion of said pin, the open end thereof being closed by a threadedplug 18, whereby a chamber or reservoir is formed, as shown. In theinner face of disk 10 is formed a groove 19, eccentrically arranged withthe opening 11, and communication between the same and bore 17 isestablished by means of a channel 20. A second channel 12 extendstransversely of the pin 15, leading from chamber 17 to the circumferenceof said pin. The disk 10 is provided with the usual counterweightedportion 22.

In practice my improved crank pin and disk are preferably cast in oneintegral piece, the bore 17 being obtained by employinga core for thepurpose. Ithus secure acrank pin and disk which is far more simple andinexpensive than the forms now in general use, and which at the sametime is stronger and more durable. By employing a core in the pin incasting I am enabled to secure a perfect homogeneous casting devoid ofblow-holes, particularly at the point where the crank pin joins thedisk, the point which receives the greatest strain. By this means I alsosecure a reservoir for oil whereby sure and automatic lubrication of thecrank-pin is secured and the task of securing an oil-channel leading tothe surface of the disk is minimized. It will thus be observed that myimproved crank disk and pin possesses many advantages, all of which willbe apparent to those skilled in the art to which it appertains. Bymaking the disk and crank in one'piece I am enabled to provide a largerpm than is practicable under the present methods of making them ofseparate parts, this being of particular advantage in short- 7 strokeengines.

I claim as my invention 1. A cast crank-disk having a laterally-extendedintegral pin, the inner portion of said pin being provided in castingwith a central longitudinally cored opening crossing the plane of theadjacent face of said disk, whereby a homogeneous casting is secured atthe junction of the pin with said adjacent face of the disk, saidopening also forming an oil-reservoir.

2. A cast crank-disk having a laterally-extended integral pin, said-diskbeing provided in casting with a cored opening extending transverselytherethrough from its inner face and continued longitudinally into theinner portion of said pin, whereby a homogeneous casting is secured atthe junction of the pin with the adjacent face of the disk,said openingalso forming an oil-reservoir.

3. A cast 0 'ank-disk having a laterally-extended integral pin, saiddisk being provided in casting with a cored opening extendingtransversely therethrough from its inner face and continuedlongitudinally into the inner portion of said pin, whereby a homogeneouscasting is secured at the junction of the pin with the adjacent face ofthe disk,said opening also forming an oil-reservoir, and a removableclosure working in the disk end of said opening, said disk and pin beingprovided with channels leading from said opening.

4:. A cast crank-disk having a laterally-extended integral pin, saiddisk being provided in casting with a transverse cored opening extendinglongitudinally into the inner portion of said pin, whereby a homogeneouscasting is

